Concrete-mixing machine



Sept. 4, 1928. 1,683,417 S. SHAFE R, JR

Filed June 7, 1927 INVENTOR.

A TTORNE Y.

Patented Sept. 4,, 1928.

PATENT OFFICE.

SAMUEL SHAFER, JR, .0]? MILWAUKF-E, WISCONSIN, ASSIGNOR TO CHAIN BELT COM- PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

CONCRETE-MIXING MACHINE.

Application filed June 7,

This invention relates to concrete mixing machines, and has for one'of its objects to provide a device for vibrating or arring the sub-chute which directs the dry materials from the loading skip into the mixing drum, to, the end that any materials which may stick to the walls of the sub-chute will be jarred I loose, and the loading of the drum thereby facilitated. p r I I A further object of the invention is to provide a vibrator of the classdescribed which will be automatically actuated through the lowering movement of the skip.

' A still further object of the invention is to provide a device of the class described which will be simple in construction, com- 4 forming a part of this specification, in which like reference characters designate like parts in all the views;

Figure 1 is a diagrammatic side elevational view of a typical form .of concrete mixer,

I with a vibrating apparatus constructed in accordance with the present invention associated with the sub-chute and loading skip thereof; and

Fig. 2 is anenlarged fragmentary elevational view of the vi rating apparatus, with the parts shown in a different position.

Referring more particularly to the stud drawings, the concrete mixer is prov1ded w 1th a frame 10, in which is mounted the mixing drum 11, driven in the usual and well known manner from the motor, not shown. The

loading skip 12 is provided with the arms- 13, which are pivotally mounted as at 14, in the frame 10; and the said skip in its raised position, indicated in dotted lines in Fig. 1, is adapted to discharge its contents into the sub-chute 15, which guides the said contents into the drum 11', as will be readily understood. ,The skip is raised by means of the cable 16 and winding drum 17, and is lowered. by gravity, in the usual manner.

The vibrating apparatus constltutmg the 1927. Serial No. 197,125.

present invention comprises an arm 20, pivoted at 21 to a porton of the frame 10, and

provided with a head 22 which is adapted to engage the subchute 15, as shown in-Fig. 1, under the action of the tension spring 23.

A bar or rod 24-is pivotally connected to the arm 26 at 25,,and is provided with a hook or..pro ect1on 26, having an inclined or slopmg back surface 27. A sector 28, connected to and movable with the skip arm 13, is provided with a plurality of arcuately spaced pins or studs 29, 30, and 31, best shown in. y

the detail views. The said pins or studs proect outwardly from the sector, and the rod or bar 24 is arranged to rest/thereon, and have its hook member 26 successively engaged thereby, as the sector moves in a clockwise direction (asviewed in Fig; 1)- when the skip is lowered. I

During such movement, the pin 29' first engages the hook member, and thereby moves the bar 24, together with the arm-20 and head 22 toward the right, as viewed inFig. 1, against the tension ofthe spring 23, thus withdrawing the head 22 from contact with the wall of the sub-chute 15. Continued movement of the sector brings the pin 30 intoengagement with the under surface of the bar 24, and lifts the said bar, thereby disengaging the hook 26 from the pin 29,

whereupon the spring 23 draws the arm 20, head 22, and rod.24 toward the left," causing the head to strike the sub-chute a sharp blow thereby loosening any material which may have adhered to the walls thereof. Further movement of the sector-causes the pins 30 and 31 to repeat the cycle of movements just described, as will be .readily understood.

During the reverse motion of-the sector, as the, skip is being raised, the pins or studs slide over the inclined face 27 .of the hook member 26 without imparting movement to slightly rock the the bar 24, other than to same about its pivot 25.

1 While oneiform of the invention has been illustrated'and described, it is obvious that those skilled in the art may vary the details of construction, as well as the precise arrangement of parts, without departing from the spirit of the invention, and therefore it is not wished to be limited to the above disclosure, except as may be "required by the claims. a

What is claimed is:

1. In a concrete mixing machine, the combination with a loading skip and a sub-chute adapted to receive material from said skip, of means operable by the movement of said skip for striking said sub-chute to loosen material adhering to the walls thereof.

2. In a concrete mixing machine, the combination with a loading skip adapted to be raised and lowered, and a sub-chute for receiving material from said skip when in'itsraised position, of means operable by the lowering movement of said skip, for striking said sub-chute to loosen material adhering to the walls thereof. 4

3. In a concrete mixing machine, a loading skip; means for raising and'lowering said skip; a sub-chute for receiving materialfrom said skip; a vibrator for striking saidsubchute to loosen material adhering to its walls; and means movable with said skip for actuating said vibrator during the lowering movement of said skip. I

4. In a concrete mixing machine, a loading skip pivoted for vertical swing; a'sub-- chute for receiving material from said skip;

a pivoted arm adapted to strikesaid sub-.

chute to loosen material adhering to its walls; means normally urging sa1d arm 1nto engagement with said sub-chute; and means associated with said skip for withdrawing said arm from engagement ...with said sub-chute and releasing it, whereby said first named means may return it. v

5. In. a concrete mixing machine, a loading skip pivotedfor vertical swing; a sub-chute for receiving material from said skip; a pivoted arm adapted to strike said sub-chute to loosenv materialadhering to the walls thereof; a spring urging said arminto-v eni gagement with said sub-chute; a hook memfor receiving material from said skip; a pivoted arm adapted to strike said sub-chute to loosen material adhering to 1ts walls; a sprmg urg ng sa1d arm into engagement -with said sub-chute; a bar pivotally carried bysaid arm, provided with a hook portion; and a stud movable with said skip for engaging said hook portion to withdraw said arm from said sub-chute.

7. In a concrete mixing machine, a loading skip pivoted for vertical swing; a sub-chute for receiving material from said skip; a pivoted arm adapted to strike said sub-chute to loosen material adhering to itswalls; a

. spring urging sa1d arm 1nto engagement with said sub-chute; a bar pivotally carried by said arm, provided with a hook portion; and

a plurality of studs movable with said, skip, adapted to successively engage said hook portion and withdraw said arm from- -said subchute, successive. studs first engaging said SAMUEL SHAFER, JR. 

